【摘要】：為研究四心圓隧道襯砌荷載和滲流量,基于等效面積法將四心圓隧道等效為圓形隧道,運用隧道滲流場解析解分別求得在不同的襯砌滲透系數(shù)、襯砌厚度和埋深情況下隧道襯砌外水頭、注漿圈外水頭和滲流量;并與相同工況下的數(shù)值解進(jìn)行對比,分析解析解的應(yīng)用效果。運用該方法分析了襯砌相對滲透系數(shù)和注漿圈相對滲透系數(shù)對隧道滲流場的影響,研究結(jié)果表明:解析解和數(shù)值解最大誤差在5.2%以內(nèi),證明了解析解的適用性。當(dāng)襯砌抗?jié)B性能較好時,降低注漿圈滲透系數(shù)能夠有效地分擔(dān)襯砌外水荷載,有利于隧道安全。襯砌對隧道滲流量影響最為顯著,實際工程施工中應(yīng)在較好的注漿水平上,通過控制襯砌滲透性來有效地改善隧道滲流場。最后將提出的方法用于工程實例中,解析解的應(yīng)用效果和基于解析解的滲流參數(shù)敏感性分析所得結(jié)論的可靠性得到了較好的驗證。
[Abstract]:In order to study the lining load and seepage flow of a four-center circular tunnel, the four-center circular tunnel is equivalent to a circular tunnel based on the equivalent area method, and the permeability coefficients of different lining are obtained by using the analytical solution of the seepage field of the tunnel. Under the condition of lining thickness and buried depth, the tunnel lining outside water head, grouting ring water head and seepage flow are compared with the numerical solution under the same working condition, and the application effect of the solution is analyzed. The influence of relative permeability coefficient of lining and grouting ring on the seepage field of tunnel is analyzed by using this method. The results show that the maximum error between analytical solution and numerical solution is within 5.2%, which proves the applicability of the analytical solution. When the impermeability of lining is good, reducing the permeability coefficient of grouting ring can effectively share the external water load of lining, which is beneficial to tunnel safety. The lining has the most significant influence on the tunnel seepage flow. The seepage field of the tunnel should be effectively improved by controlling the lining permeability at a better grouting level in the actual engineering construction. Finally, the proposed method is applied to engineering examples. The application effect of the analytical solution and the reliability of the conclusions obtained from the sensitivity analysis of seepage parameters based on the analytical solution are well verified.
【作者單位】： 中國地質(zhì)大學(xué)(武漢)工程學(xué)院;
【基金】：國家自然科學(xué)基金(41202201)資助
【分類號】：U452.11

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